1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2014 John W. Linville <[email protected]>
3 * Originally based upon librte_pmd_pcap code:
4 * Copyright(c) 2010-2015 Intel Corporation.
5 * Copyright(c) 2014 6WIND S.A.
6 * All rights reserved.
7 */
8
9 #include <rte_string_fns.h>
10 #include <rte_mbuf.h>
11 #include <rte_ethdev_driver.h>
12 #include <rte_ethdev_vdev.h>
13 #include <rte_malloc.h>
14 #include <rte_kvargs.h>
15 #include <rte_bus_vdev.h>
16
17 #include <errno.h>
18 #include <linux/if_ether.h>
19 #include <linux/if_packet.h>
20 #include <arpa/inet.h>
21 #include <net/if.h>
22 #include <net/if_arp.h>
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <sys/ioctl.h>
26 #include <string.h>
27 #include <sys/mman.h>
28 #include <unistd.h>
29 #include <poll.h>
30
31 #define ETH_AF_PACKET_IFACE_ARG "iface"
32 #define ETH_AF_PACKET_NUM_Q_ARG "qpairs"
33 #define ETH_AF_PACKET_BLOCKSIZE_ARG "blocksz"
34 #define ETH_AF_PACKET_FRAMESIZE_ARG "framesz"
35 #define ETH_AF_PACKET_FRAMECOUNT_ARG "framecnt"
36 #define ETH_AF_PACKET_QDISC_BYPASS_ARG "qdisc_bypass"
37
38 #define DFLT_FRAME_SIZE (1 << 11)
39 #define DFLT_FRAME_COUNT (1 << 9)
40
41 struct pkt_rx_queue {
42 int sockfd;
43
44 struct iovec *rd;
45 uint8_t *map;
46 unsigned int framecount;
47 unsigned int framenum;
48
49 struct rte_mempool *mb_pool;
50 uint16_t in_port;
51
52 volatile unsigned long rx_pkts;
53 volatile unsigned long rx_bytes;
54 };
55
56 struct pkt_tx_queue {
57 int sockfd;
58 unsigned int frame_data_size;
59
60 struct iovec *rd;
61 uint8_t *map;
62 unsigned int framecount;
63 unsigned int framenum;
64
65 volatile unsigned long tx_pkts;
66 volatile unsigned long err_pkts;
67 volatile unsigned long tx_bytes;
68 };
69
70 struct pmd_internals {
71 unsigned nb_queues;
72
73 int if_index;
74 char *if_name;
75 struct rte_ether_addr eth_addr;
76
77 struct tpacket_req req;
78
79 struct pkt_rx_queue *rx_queue;
80 struct pkt_tx_queue *tx_queue;
81 };
82
83 static const char *valid_arguments[] = {
84 ETH_AF_PACKET_IFACE_ARG,
85 ETH_AF_PACKET_NUM_Q_ARG,
86 ETH_AF_PACKET_BLOCKSIZE_ARG,
87 ETH_AF_PACKET_FRAMESIZE_ARG,
88 ETH_AF_PACKET_FRAMECOUNT_ARG,
89 ETH_AF_PACKET_QDISC_BYPASS_ARG,
90 NULL
91 };
92
93 static struct rte_eth_link pmd_link = {
94 .link_speed = ETH_SPEED_NUM_10G,
95 .link_duplex = ETH_LINK_FULL_DUPLEX,
96 .link_status = ETH_LINK_DOWN,
97 .link_autoneg = ETH_LINK_FIXED,
98 };
99
100 RTE_LOG_REGISTER(af_packet_logtype, pmd.net.packet, NOTICE);
101
102 #define PMD_LOG(level, fmt, args...) \
103 rte_log(RTE_LOG_ ## level, af_packet_logtype, \
104 "%s(): " fmt "\n", __func__, ##args)
105
106 #define PMD_LOG_ERRNO(level, fmt, args...) \
107 rte_log(RTE_LOG_ ## level, af_packet_logtype, \
108 "%s(): " fmt ":%s\n", __func__, ##args, strerror(errno))
109
110 static uint16_t
eth_af_packet_rx(void * queue,struct rte_mbuf ** bufs,uint16_t nb_pkts)111 eth_af_packet_rx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
112 {
113 unsigned i;
114 struct tpacket2_hdr *ppd;
115 struct rte_mbuf *mbuf;
116 uint8_t *pbuf;
117 struct pkt_rx_queue *pkt_q = queue;
118 uint16_t num_rx = 0;
119 unsigned long num_rx_bytes = 0;
120 unsigned int framecount, framenum;
121
122 if (unlikely(nb_pkts == 0))
123 return 0;
124
125 /*
126 * Reads the given number of packets from the AF_PACKET socket one by
127 * one and copies the packet data into a newly allocated mbuf.
128 */
129 framecount = pkt_q->framecount;
130 framenum = pkt_q->framenum;
131 for (i = 0; i < nb_pkts; i++) {
132 /* point at the next incoming frame */
133 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
134 if ((ppd->tp_status & TP_STATUS_USER) == 0)
135 break;
136
137 /* allocate the next mbuf */
138 mbuf = rte_pktmbuf_alloc(pkt_q->mb_pool);
139 if (unlikely(mbuf == NULL))
140 break;
141
142 /* packet will fit in the mbuf, go ahead and receive it */
143 rte_pktmbuf_pkt_len(mbuf) = rte_pktmbuf_data_len(mbuf) = ppd->tp_snaplen;
144 pbuf = (uint8_t *) ppd + ppd->tp_mac;
145 memcpy(rte_pktmbuf_mtod(mbuf, void *), pbuf, rte_pktmbuf_data_len(mbuf));
146
147 /* check for vlan info */
148 if (ppd->tp_status & TP_STATUS_VLAN_VALID) {
149 mbuf->vlan_tci = ppd->tp_vlan_tci;
150 mbuf->ol_flags |= (PKT_RX_VLAN | PKT_RX_VLAN_STRIPPED);
151 }
152
153 /* release incoming frame and advance ring buffer */
154 ppd->tp_status = TP_STATUS_KERNEL;
155 if (++framenum >= framecount)
156 framenum = 0;
157 mbuf->port = pkt_q->in_port;
158
159 /* account for the receive frame */
160 bufs[i] = mbuf;
161 num_rx++;
162 num_rx_bytes += mbuf->pkt_len;
163 }
164 pkt_q->framenum = framenum;
165 pkt_q->rx_pkts += num_rx;
166 pkt_q->rx_bytes += num_rx_bytes;
167 return num_rx;
168 }
169
170 /*
171 * Callback to handle sending packets through a real NIC.
172 */
173 static uint16_t
eth_af_packet_tx(void * queue,struct rte_mbuf ** bufs,uint16_t nb_pkts)174 eth_af_packet_tx(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts)
175 {
176 struct tpacket2_hdr *ppd;
177 struct rte_mbuf *mbuf;
178 uint8_t *pbuf;
179 unsigned int framecount, framenum;
180 struct pollfd pfd;
181 struct pkt_tx_queue *pkt_q = queue;
182 uint16_t num_tx = 0;
183 unsigned long num_tx_bytes = 0;
184 int i;
185
186 if (unlikely(nb_pkts == 0))
187 return 0;
188
189 memset(&pfd, 0, sizeof(pfd));
190 pfd.fd = pkt_q->sockfd;
191 pfd.events = POLLOUT;
192 pfd.revents = 0;
193
194 framecount = pkt_q->framecount;
195 framenum = pkt_q->framenum;
196 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
197 for (i = 0; i < nb_pkts; i++) {
198 mbuf = *bufs++;
199
200 /* drop oversized packets */
201 if (mbuf->pkt_len > pkt_q->frame_data_size) {
202 rte_pktmbuf_free(mbuf);
203 continue;
204 }
205
206 /* insert vlan info if necessary */
207 if (mbuf->ol_flags & PKT_TX_VLAN_PKT) {
208 if (rte_vlan_insert(&mbuf)) {
209 rte_pktmbuf_free(mbuf);
210 continue;
211 }
212 }
213
214 /* point at the next incoming frame */
215 if ((ppd->tp_status != TP_STATUS_AVAILABLE) &&
216 (poll(&pfd, 1, -1) < 0))
217 break;
218
219 /* copy the tx frame data */
220 pbuf = (uint8_t *) ppd + TPACKET2_HDRLEN -
221 sizeof(struct sockaddr_ll);
222
223 struct rte_mbuf *tmp_mbuf = mbuf;
224 while (tmp_mbuf) {
225 uint16_t data_len = rte_pktmbuf_data_len(tmp_mbuf);
226 memcpy(pbuf, rte_pktmbuf_mtod(tmp_mbuf, void*), data_len);
227 pbuf += data_len;
228 tmp_mbuf = tmp_mbuf->next;
229 }
230
231 ppd->tp_len = mbuf->pkt_len;
232 ppd->tp_snaplen = mbuf->pkt_len;
233
234 /* release incoming frame and advance ring buffer */
235 ppd->tp_status = TP_STATUS_SEND_REQUEST;
236 if (++framenum >= framecount)
237 framenum = 0;
238 ppd = (struct tpacket2_hdr *) pkt_q->rd[framenum].iov_base;
239
240 num_tx++;
241 num_tx_bytes += mbuf->pkt_len;
242 rte_pktmbuf_free(mbuf);
243 }
244
245 /* kick-off transmits */
246 if (sendto(pkt_q->sockfd, NULL, 0, MSG_DONTWAIT, NULL, 0) == -1 &&
247 errno != ENOBUFS && errno != EAGAIN) {
248 /*
249 * In case of a ENOBUFS/EAGAIN error all of the enqueued
250 * packets will be considered successful even though only some
251 * are sent.
252 */
253
254 num_tx = 0;
255 num_tx_bytes = 0;
256 }
257
258 pkt_q->framenum = framenum;
259 pkt_q->tx_pkts += num_tx;
260 pkt_q->err_pkts += i - num_tx;
261 pkt_q->tx_bytes += num_tx_bytes;
262 return i;
263 }
264
265 static int
eth_dev_start(struct rte_eth_dev * dev)266 eth_dev_start(struct rte_eth_dev *dev)
267 {
268 dev->data->dev_link.link_status = ETH_LINK_UP;
269 return 0;
270 }
271
272 /*
273 * This function gets called when the current port gets stopped.
274 */
275 static int
eth_dev_stop(struct rte_eth_dev * dev)276 eth_dev_stop(struct rte_eth_dev *dev)
277 {
278 unsigned i;
279 int sockfd;
280 struct pmd_internals *internals = dev->data->dev_private;
281
282 for (i = 0; i < internals->nb_queues; i++) {
283 sockfd = internals->rx_queue[i].sockfd;
284 if (sockfd != -1)
285 close(sockfd);
286
287 /* Prevent use after free in case tx fd == rx fd */
288 if (sockfd != internals->tx_queue[i].sockfd) {
289 sockfd = internals->tx_queue[i].sockfd;
290 if (sockfd != -1)
291 close(sockfd);
292 }
293
294 internals->rx_queue[i].sockfd = -1;
295 internals->tx_queue[i].sockfd = -1;
296 }
297
298 dev->data->dev_link.link_status = ETH_LINK_DOWN;
299 return 0;
300 }
301
302 static int
eth_dev_configure(struct rte_eth_dev * dev __rte_unused)303 eth_dev_configure(struct rte_eth_dev *dev __rte_unused)
304 {
305 return 0;
306 }
307
308 static int
eth_dev_info(struct rte_eth_dev * dev,struct rte_eth_dev_info * dev_info)309 eth_dev_info(struct rte_eth_dev *dev, struct rte_eth_dev_info *dev_info)
310 {
311 struct pmd_internals *internals = dev->data->dev_private;
312
313 dev_info->if_index = internals->if_index;
314 dev_info->max_mac_addrs = 1;
315 dev_info->max_rx_pktlen = (uint32_t)ETH_FRAME_LEN;
316 dev_info->max_rx_queues = (uint16_t)internals->nb_queues;
317 dev_info->max_tx_queues = (uint16_t)internals->nb_queues;
318 dev_info->min_rx_bufsize = 0;
319 dev_info->tx_offload_capa = DEV_TX_OFFLOAD_MULTI_SEGS |
320 DEV_TX_OFFLOAD_VLAN_INSERT;
321
322 return 0;
323 }
324
325 static int
eth_stats_get(struct rte_eth_dev * dev,struct rte_eth_stats * igb_stats)326 eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *igb_stats)
327 {
328 unsigned i, imax;
329 unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
330 unsigned long rx_bytes_total = 0, tx_bytes_total = 0;
331 const struct pmd_internals *internal = dev->data->dev_private;
332
333 imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
334 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
335 for (i = 0; i < imax; i++) {
336 igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts;
337 igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes;
338 rx_total += igb_stats->q_ipackets[i];
339 rx_bytes_total += igb_stats->q_ibytes[i];
340 }
341
342 imax = (internal->nb_queues < RTE_ETHDEV_QUEUE_STAT_CNTRS ?
343 internal->nb_queues : RTE_ETHDEV_QUEUE_STAT_CNTRS);
344 for (i = 0; i < imax; i++) {
345 igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts;
346 igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes;
347 tx_total += igb_stats->q_opackets[i];
348 tx_err_total += internal->tx_queue[i].err_pkts;
349 tx_bytes_total += igb_stats->q_obytes[i];
350 }
351
352 igb_stats->ipackets = rx_total;
353 igb_stats->ibytes = rx_bytes_total;
354 igb_stats->opackets = tx_total;
355 igb_stats->oerrors = tx_err_total;
356 igb_stats->obytes = tx_bytes_total;
357 return 0;
358 }
359
360 static int
eth_stats_reset(struct rte_eth_dev * dev)361 eth_stats_reset(struct rte_eth_dev *dev)
362 {
363 unsigned i;
364 struct pmd_internals *internal = dev->data->dev_private;
365
366 for (i = 0; i < internal->nb_queues; i++) {
367 internal->rx_queue[i].rx_pkts = 0;
368 internal->rx_queue[i].rx_bytes = 0;
369 }
370
371 for (i = 0; i < internal->nb_queues; i++) {
372 internal->tx_queue[i].tx_pkts = 0;
373 internal->tx_queue[i].err_pkts = 0;
374 internal->tx_queue[i].tx_bytes = 0;
375 }
376
377 return 0;
378 }
379
380 static int
eth_dev_close(struct rte_eth_dev * dev)381 eth_dev_close(struct rte_eth_dev *dev)
382 {
383 struct pmd_internals *internals;
384 struct tpacket_req *req;
385 unsigned int q;
386
387 if (rte_eal_process_type() != RTE_PROC_PRIMARY)
388 return 0;
389
390 PMD_LOG(INFO, "Closing AF_PACKET ethdev on NUMA socket %u",
391 rte_socket_id());
392
393 internals = dev->data->dev_private;
394 req = &internals->req;
395 for (q = 0; q < internals->nb_queues; q++) {
396 munmap(internals->rx_queue[q].map,
397 2 * req->tp_block_size * req->tp_block_nr);
398 rte_free(internals->rx_queue[q].rd);
399 rte_free(internals->tx_queue[q].rd);
400 }
401 free(internals->if_name);
402 rte_free(internals->rx_queue);
403 rte_free(internals->tx_queue);
404
405 /* mac_addrs must not be freed alone because part of dev_private */
406 dev->data->mac_addrs = NULL;
407 return 0;
408 }
409
410 static void
eth_queue_release(void * q __rte_unused)411 eth_queue_release(void *q __rte_unused)
412 {
413 }
414
415 static int
eth_link_update(struct rte_eth_dev * dev __rte_unused,int wait_to_complete __rte_unused)416 eth_link_update(struct rte_eth_dev *dev __rte_unused,
417 int wait_to_complete __rte_unused)
418 {
419 return 0;
420 }
421
422 static int
eth_rx_queue_setup(struct rte_eth_dev * dev,uint16_t rx_queue_id,uint16_t nb_rx_desc __rte_unused,unsigned int socket_id __rte_unused,const struct rte_eth_rxconf * rx_conf __rte_unused,struct rte_mempool * mb_pool)423 eth_rx_queue_setup(struct rte_eth_dev *dev,
424 uint16_t rx_queue_id,
425 uint16_t nb_rx_desc __rte_unused,
426 unsigned int socket_id __rte_unused,
427 const struct rte_eth_rxconf *rx_conf __rte_unused,
428 struct rte_mempool *mb_pool)
429 {
430 struct pmd_internals *internals = dev->data->dev_private;
431 struct pkt_rx_queue *pkt_q = &internals->rx_queue[rx_queue_id];
432 unsigned int buf_size, data_size;
433
434 pkt_q->mb_pool = mb_pool;
435
436 /* Now get the space available for data in the mbuf */
437 buf_size = rte_pktmbuf_data_room_size(pkt_q->mb_pool) -
438 RTE_PKTMBUF_HEADROOM;
439 data_size = internals->req.tp_frame_size;
440 data_size -= TPACKET2_HDRLEN - sizeof(struct sockaddr_ll);
441
442 if (data_size > buf_size) {
443 PMD_LOG(ERR,
444 "%s: %d bytes will not fit in mbuf (%d bytes)",
445 dev->device->name, data_size, buf_size);
446 return -ENOMEM;
447 }
448
449 dev->data->rx_queues[rx_queue_id] = pkt_q;
450 pkt_q->in_port = dev->data->port_id;
451
452 return 0;
453 }
454
455 static int
eth_tx_queue_setup(struct rte_eth_dev * dev,uint16_t tx_queue_id,uint16_t nb_tx_desc __rte_unused,unsigned int socket_id __rte_unused,const struct rte_eth_txconf * tx_conf __rte_unused)456 eth_tx_queue_setup(struct rte_eth_dev *dev,
457 uint16_t tx_queue_id,
458 uint16_t nb_tx_desc __rte_unused,
459 unsigned int socket_id __rte_unused,
460 const struct rte_eth_txconf *tx_conf __rte_unused)
461 {
462
463 struct pmd_internals *internals = dev->data->dev_private;
464
465 dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id];
466 return 0;
467 }
468
469 static int
eth_dev_mtu_set(struct rte_eth_dev * dev,uint16_t mtu)470 eth_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
471 {
472 struct pmd_internals *internals = dev->data->dev_private;
473 struct ifreq ifr = { .ifr_mtu = mtu };
474 int ret;
475 int s;
476 unsigned int data_size = internals->req.tp_frame_size -
477 TPACKET2_HDRLEN;
478
479 if (mtu > data_size)
480 return -EINVAL;
481
482 s = socket(PF_INET, SOCK_DGRAM, 0);
483 if (s < 0)
484 return -EINVAL;
485
486 strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
487 ret = ioctl(s, SIOCSIFMTU, &ifr);
488 close(s);
489
490 if (ret < 0)
491 return -EINVAL;
492
493 return 0;
494 }
495
496 static int
eth_dev_macaddr_set(struct rte_eth_dev * dev,struct rte_ether_addr * addr)497 eth_dev_macaddr_set(struct rte_eth_dev *dev, struct rte_ether_addr *addr)
498 {
499 struct pmd_internals *internals = dev->data->dev_private;
500 struct ifreq ifr = { };
501 int sockfd = internals->rx_queue[0].sockfd;
502 int ret;
503
504 if (sockfd == -1) {
505 PMD_LOG(ERR, "receive socket not found");
506 return -EINVAL;
507 }
508
509 strlcpy(ifr.ifr_name, internals->if_name, IFNAMSIZ);
510 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
511 memcpy(ifr.ifr_hwaddr.sa_data, addr, sizeof(*addr));
512 ret = ioctl(sockfd, SIOCSIFHWADDR, &ifr);
513
514 if (ret < 0) {
515 PMD_LOG_ERRNO(ERR, "ioctl(SIOCSIFHWADDR) failed");
516 return -EINVAL;
517 }
518
519 return 0;
520 }
521
522 static int
eth_dev_change_flags(char * if_name,uint32_t flags,uint32_t mask)523 eth_dev_change_flags(char *if_name, uint32_t flags, uint32_t mask)
524 {
525 struct ifreq ifr;
526 int ret = 0;
527 int s;
528
529 s = socket(PF_INET, SOCK_DGRAM, 0);
530 if (s < 0)
531 return -errno;
532
533 strlcpy(ifr.ifr_name, if_name, IFNAMSIZ);
534 if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0) {
535 ret = -errno;
536 goto out;
537 }
538 ifr.ifr_flags &= mask;
539 ifr.ifr_flags |= flags;
540 if (ioctl(s, SIOCSIFFLAGS, &ifr) < 0) {
541 ret = -errno;
542 goto out;
543 }
544 out:
545 close(s);
546 return ret;
547 }
548
549 static int
eth_dev_promiscuous_enable(struct rte_eth_dev * dev)550 eth_dev_promiscuous_enable(struct rte_eth_dev *dev)
551 {
552 struct pmd_internals *internals = dev->data->dev_private;
553
554 return eth_dev_change_flags(internals->if_name, IFF_PROMISC, ~0);
555 }
556
557 static int
eth_dev_promiscuous_disable(struct rte_eth_dev * dev)558 eth_dev_promiscuous_disable(struct rte_eth_dev *dev)
559 {
560 struct pmd_internals *internals = dev->data->dev_private;
561
562 return eth_dev_change_flags(internals->if_name, 0, ~IFF_PROMISC);
563 }
564
565 static const struct eth_dev_ops ops = {
566 .dev_start = eth_dev_start,
567 .dev_stop = eth_dev_stop,
568 .dev_close = eth_dev_close,
569 .dev_configure = eth_dev_configure,
570 .dev_infos_get = eth_dev_info,
571 .mac_addr_set = eth_dev_macaddr_set,
572 .mtu_set = eth_dev_mtu_set,
573 .promiscuous_enable = eth_dev_promiscuous_enable,
574 .promiscuous_disable = eth_dev_promiscuous_disable,
575 .rx_queue_setup = eth_rx_queue_setup,
576 .tx_queue_setup = eth_tx_queue_setup,
577 .rx_queue_release = eth_queue_release,
578 .tx_queue_release = eth_queue_release,
579 .link_update = eth_link_update,
580 .stats_get = eth_stats_get,
581 .stats_reset = eth_stats_reset,
582 };
583
584 /*
585 * Opens an AF_PACKET socket
586 */
587 static int
open_packet_iface(const char * key __rte_unused,const char * value __rte_unused,void * extra_args)588 open_packet_iface(const char *key __rte_unused,
589 const char *value __rte_unused,
590 void *extra_args)
591 {
592 int *sockfd = extra_args;
593
594 /* Open an AF_PACKET socket... */
595 *sockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
596 if (*sockfd == -1) {
597 PMD_LOG(ERR, "Could not open AF_PACKET socket");
598 return -1;
599 }
600
601 return 0;
602 }
603
604 static int
rte_pmd_init_internals(struct rte_vdev_device * dev,const int sockfd,const unsigned nb_queues,unsigned int blocksize,unsigned int blockcnt,unsigned int framesize,unsigned int framecnt,unsigned int qdisc_bypass,struct pmd_internals ** internals,struct rte_eth_dev ** eth_dev,struct rte_kvargs * kvlist)605 rte_pmd_init_internals(struct rte_vdev_device *dev,
606 const int sockfd,
607 const unsigned nb_queues,
608 unsigned int blocksize,
609 unsigned int blockcnt,
610 unsigned int framesize,
611 unsigned int framecnt,
612 unsigned int qdisc_bypass,
613 struct pmd_internals **internals,
614 struct rte_eth_dev **eth_dev,
615 struct rte_kvargs *kvlist)
616 {
617 const char *name = rte_vdev_device_name(dev);
618 const unsigned int numa_node = dev->device.numa_node;
619 struct rte_eth_dev_data *data = NULL;
620 struct rte_kvargs_pair *pair = NULL;
621 struct ifreq ifr;
622 size_t ifnamelen;
623 unsigned k_idx;
624 struct sockaddr_ll sockaddr;
625 struct tpacket_req *req;
626 struct pkt_rx_queue *rx_queue;
627 struct pkt_tx_queue *tx_queue;
628 int rc, tpver, discard;
629 int qsockfd = -1;
630 unsigned int i, q, rdsize;
631 #if defined(PACKET_FANOUT)
632 int fanout_arg;
633 #endif
634
635 for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
636 pair = &kvlist->pairs[k_idx];
637 if (strstr(pair->key, ETH_AF_PACKET_IFACE_ARG) != NULL)
638 break;
639 }
640 if (pair == NULL) {
641 PMD_LOG(ERR,
642 "%s: no interface specified for AF_PACKET ethdev",
643 name);
644 return -1;
645 }
646
647 PMD_LOG(INFO,
648 "%s: creating AF_PACKET-backed ethdev on numa socket %u",
649 name, numa_node);
650
651 *internals = rte_zmalloc_socket(name, sizeof(**internals),
652 0, numa_node);
653 if (*internals == NULL)
654 return -1;
655
656
657 (*internals)->rx_queue = rte_calloc_socket("af_packet_rx",
658 nb_queues,
659 sizeof(struct pkt_rx_queue),
660 0, numa_node);
661 (*internals)->tx_queue = rte_calloc_socket("af_packet_tx",
662 nb_queues,
663 sizeof(struct pkt_tx_queue),
664 0, numa_node);
665 if (!(*internals)->rx_queue || !(*internals)->tx_queue) {
666 goto free_internals;
667 }
668
669 for (q = 0; q < nb_queues; q++) {
670 (*internals)->rx_queue[q].map = MAP_FAILED;
671 (*internals)->tx_queue[q].map = MAP_FAILED;
672 (*internals)->rx_queue[q].sockfd = -1;
673 (*internals)->tx_queue[q].sockfd = -1;
674 }
675
676 req = &((*internals)->req);
677
678 req->tp_block_size = blocksize;
679 req->tp_block_nr = blockcnt;
680 req->tp_frame_size = framesize;
681 req->tp_frame_nr = framecnt;
682
683 ifnamelen = strlen(pair->value);
684 if (ifnamelen < sizeof(ifr.ifr_name)) {
685 memcpy(ifr.ifr_name, pair->value, ifnamelen);
686 ifr.ifr_name[ifnamelen] = '\0';
687 } else {
688 PMD_LOG(ERR,
689 "%s: I/F name too long (%s)",
690 name, pair->value);
691 goto free_internals;
692 }
693 if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
694 PMD_LOG_ERRNO(ERR, "%s: ioctl failed (SIOCGIFINDEX)", name);
695 goto free_internals;
696 }
697 (*internals)->if_name = strdup(pair->value);
698 if ((*internals)->if_name == NULL)
699 goto free_internals;
700 (*internals)->if_index = ifr.ifr_ifindex;
701
702 if (ioctl(sockfd, SIOCGIFHWADDR, &ifr) == -1) {
703 PMD_LOG_ERRNO(ERR, "%s: ioctl failed (SIOCGIFHWADDR)", name);
704 goto free_internals;
705 }
706 memcpy(&(*internals)->eth_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
707
708 memset(&sockaddr, 0, sizeof(sockaddr));
709 sockaddr.sll_family = AF_PACKET;
710 sockaddr.sll_protocol = htons(ETH_P_ALL);
711 sockaddr.sll_ifindex = (*internals)->if_index;
712
713 #if defined(PACKET_FANOUT)
714 fanout_arg = (getpid() ^ (*internals)->if_index) & 0xffff;
715 fanout_arg |= (PACKET_FANOUT_HASH | PACKET_FANOUT_FLAG_DEFRAG) << 16;
716 #if defined(PACKET_FANOUT_FLAG_ROLLOVER)
717 fanout_arg |= PACKET_FANOUT_FLAG_ROLLOVER << 16;
718 #endif
719 #endif
720
721 for (q = 0; q < nb_queues; q++) {
722 /* Open an AF_PACKET socket for this queue... */
723 qsockfd = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
724 if (qsockfd == -1) {
725 PMD_LOG_ERRNO(ERR,
726 "%s: could not open AF_PACKET socket",
727 name);
728 goto error;
729 }
730
731 tpver = TPACKET_V2;
732 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_VERSION,
733 &tpver, sizeof(tpver));
734 if (rc == -1) {
735 PMD_LOG_ERRNO(ERR,
736 "%s: could not set PACKET_VERSION on AF_PACKET socket for %s",
737 name, pair->value);
738 goto error;
739 }
740
741 discard = 1;
742 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_LOSS,
743 &discard, sizeof(discard));
744 if (rc == -1) {
745 PMD_LOG_ERRNO(ERR,
746 "%s: could not set PACKET_LOSS on AF_PACKET socket for %s",
747 name, pair->value);
748 goto error;
749 }
750
751 #if defined(PACKET_QDISC_BYPASS)
752 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_QDISC_BYPASS,
753 &qdisc_bypass, sizeof(qdisc_bypass));
754 if (rc == -1) {
755 PMD_LOG_ERRNO(ERR,
756 "%s: could not set PACKET_QDISC_BYPASS on AF_PACKET socket for %s",
757 name, pair->value);
758 goto error;
759 }
760 #else
761 RTE_SET_USED(qdisc_bypass);
762 #endif
763
764 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_RX_RING, req, sizeof(*req));
765 if (rc == -1) {
766 PMD_LOG_ERRNO(ERR,
767 "%s: could not set PACKET_RX_RING on AF_PACKET socket for %s",
768 name, pair->value);
769 goto error;
770 }
771
772 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_TX_RING, req, sizeof(*req));
773 if (rc == -1) {
774 PMD_LOG_ERRNO(ERR,
775 "%s: could not set PACKET_TX_RING on AF_PACKET "
776 "socket for %s", name, pair->value);
777 goto error;
778 }
779
780 rx_queue = &((*internals)->rx_queue[q]);
781 rx_queue->framecount = req->tp_frame_nr;
782
783 rx_queue->map = mmap(NULL, 2 * req->tp_block_size * req->tp_block_nr,
784 PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED,
785 qsockfd, 0);
786 if (rx_queue->map == MAP_FAILED) {
787 PMD_LOG_ERRNO(ERR,
788 "%s: call to mmap failed on AF_PACKET socket for %s",
789 name, pair->value);
790 goto error;
791 }
792
793 /* rdsize is same for both Tx and Rx */
794 rdsize = req->tp_frame_nr * sizeof(*(rx_queue->rd));
795
796 rx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
797 if (rx_queue->rd == NULL)
798 goto error;
799 for (i = 0; i < req->tp_frame_nr; ++i) {
800 rx_queue->rd[i].iov_base = rx_queue->map + (i * framesize);
801 rx_queue->rd[i].iov_len = req->tp_frame_size;
802 }
803 rx_queue->sockfd = qsockfd;
804
805 tx_queue = &((*internals)->tx_queue[q]);
806 tx_queue->framecount = req->tp_frame_nr;
807 tx_queue->frame_data_size = req->tp_frame_size;
808 tx_queue->frame_data_size -= TPACKET2_HDRLEN -
809 sizeof(struct sockaddr_ll);
810
811 tx_queue->map = rx_queue->map + req->tp_block_size * req->tp_block_nr;
812
813 tx_queue->rd = rte_zmalloc_socket(name, rdsize, 0, numa_node);
814 if (tx_queue->rd == NULL)
815 goto error;
816 for (i = 0; i < req->tp_frame_nr; ++i) {
817 tx_queue->rd[i].iov_base = tx_queue->map + (i * framesize);
818 tx_queue->rd[i].iov_len = req->tp_frame_size;
819 }
820 tx_queue->sockfd = qsockfd;
821
822 rc = bind(qsockfd, (const struct sockaddr*)&sockaddr, sizeof(sockaddr));
823 if (rc == -1) {
824 PMD_LOG_ERRNO(ERR,
825 "%s: could not bind AF_PACKET socket to %s",
826 name, pair->value);
827 goto error;
828 }
829
830 #if defined(PACKET_FANOUT)
831 rc = setsockopt(qsockfd, SOL_PACKET, PACKET_FANOUT,
832 &fanout_arg, sizeof(fanout_arg));
833 if (rc == -1) {
834 PMD_LOG_ERRNO(ERR,
835 "%s: could not set PACKET_FANOUT on AF_PACKET socket for %s",
836 name, pair->value);
837 goto error;
838 }
839 #endif
840 }
841
842 /* reserve an ethdev entry */
843 *eth_dev = rte_eth_vdev_allocate(dev, 0);
844 if (*eth_dev == NULL)
845 goto error;
846
847 /*
848 * now put it all together
849 * - store queue data in internals,
850 * - store numa_node in eth_dev
851 * - point eth_dev_data to internals
852 * - and point eth_dev structure to new eth_dev_data structure
853 */
854
855 (*internals)->nb_queues = nb_queues;
856
857 data = (*eth_dev)->data;
858 data->dev_private = *internals;
859 data->nb_rx_queues = (uint16_t)nb_queues;
860 data->nb_tx_queues = (uint16_t)nb_queues;
861 data->dev_link = pmd_link;
862 data->mac_addrs = &(*internals)->eth_addr;
863 data->dev_flags |= RTE_ETH_DEV_AUTOFILL_QUEUE_XSTATS;
864
865 (*eth_dev)->dev_ops = &ops;
866
867 return 0;
868
869 error:
870 if (qsockfd != -1)
871 close(qsockfd);
872 for (q = 0; q < nb_queues; q++) {
873 if ((*internals)->rx_queue[q].map != MAP_FAILED)
874 munmap((*internals)->rx_queue[q].map,
875 2 * req->tp_block_size * req->tp_block_nr);
876
877 rte_free((*internals)->rx_queue[q].rd);
878 rte_free((*internals)->tx_queue[q].rd);
879 if (((*internals)->rx_queue[q].sockfd >= 0) &&
880 ((*internals)->rx_queue[q].sockfd != qsockfd))
881 close((*internals)->rx_queue[q].sockfd);
882 }
883 free_internals:
884 rte_free((*internals)->rx_queue);
885 rte_free((*internals)->tx_queue);
886 free((*internals)->if_name);
887 rte_free(*internals);
888 return -1;
889 }
890
891 static int
rte_eth_from_packet(struct rte_vdev_device * dev,int const * sockfd,struct rte_kvargs * kvlist)892 rte_eth_from_packet(struct rte_vdev_device *dev,
893 int const *sockfd,
894 struct rte_kvargs *kvlist)
895 {
896 const char *name = rte_vdev_device_name(dev);
897 struct pmd_internals *internals = NULL;
898 struct rte_eth_dev *eth_dev = NULL;
899 struct rte_kvargs_pair *pair = NULL;
900 unsigned k_idx;
901 unsigned int blockcount;
902 unsigned int blocksize;
903 unsigned int framesize = DFLT_FRAME_SIZE;
904 unsigned int framecount = DFLT_FRAME_COUNT;
905 unsigned int qpairs = 1;
906 unsigned int qdisc_bypass = 1;
907
908 /* do some parameter checking */
909 if (*sockfd < 0)
910 return -1;
911
912 blocksize = getpagesize();
913
914 /*
915 * Walk arguments for configurable settings
916 */
917 for (k_idx = 0; k_idx < kvlist->count; k_idx++) {
918 pair = &kvlist->pairs[k_idx];
919 if (strstr(pair->key, ETH_AF_PACKET_NUM_Q_ARG) != NULL) {
920 qpairs = atoi(pair->value);
921 if (qpairs < 1) {
922 PMD_LOG(ERR,
923 "%s: invalid qpairs value",
924 name);
925 return -1;
926 }
927 continue;
928 }
929 if (strstr(pair->key, ETH_AF_PACKET_BLOCKSIZE_ARG) != NULL) {
930 blocksize = atoi(pair->value);
931 if (!blocksize) {
932 PMD_LOG(ERR,
933 "%s: invalid blocksize value",
934 name);
935 return -1;
936 }
937 continue;
938 }
939 if (strstr(pair->key, ETH_AF_PACKET_FRAMESIZE_ARG) != NULL) {
940 framesize = atoi(pair->value);
941 if (!framesize) {
942 PMD_LOG(ERR,
943 "%s: invalid framesize value",
944 name);
945 return -1;
946 }
947 continue;
948 }
949 if (strstr(pair->key, ETH_AF_PACKET_FRAMECOUNT_ARG) != NULL) {
950 framecount = atoi(pair->value);
951 if (!framecount) {
952 PMD_LOG(ERR,
953 "%s: invalid framecount value",
954 name);
955 return -1;
956 }
957 continue;
958 }
959 if (strstr(pair->key, ETH_AF_PACKET_QDISC_BYPASS_ARG) != NULL) {
960 qdisc_bypass = atoi(pair->value);
961 if (qdisc_bypass > 1) {
962 PMD_LOG(ERR,
963 "%s: invalid bypass value",
964 name);
965 return -1;
966 }
967 continue;
968 }
969 }
970
971 if (framesize > blocksize) {
972 PMD_LOG(ERR,
973 "%s: AF_PACKET MMAP frame size exceeds block size!",
974 name);
975 return -1;
976 }
977
978 blockcount = framecount / (blocksize / framesize);
979 if (!blockcount) {
980 PMD_LOG(ERR,
981 "%s: invalid AF_PACKET MMAP parameters", name);
982 return -1;
983 }
984
985 PMD_LOG(INFO, "%s: AF_PACKET MMAP parameters:", name);
986 PMD_LOG(INFO, "%s:\tblock size %d", name, blocksize);
987 PMD_LOG(INFO, "%s:\tblock count %d", name, blockcount);
988 PMD_LOG(INFO, "%s:\tframe size %d", name, framesize);
989 PMD_LOG(INFO, "%s:\tframe count %d", name, framecount);
990
991 if (rte_pmd_init_internals(dev, *sockfd, qpairs,
992 blocksize, blockcount,
993 framesize, framecount,
994 qdisc_bypass,
995 &internals, ð_dev,
996 kvlist) < 0)
997 return -1;
998
999 eth_dev->rx_pkt_burst = eth_af_packet_rx;
1000 eth_dev->tx_pkt_burst = eth_af_packet_tx;
1001
1002 rte_eth_dev_probing_finish(eth_dev);
1003 return 0;
1004 }
1005
1006 static int
rte_pmd_af_packet_probe(struct rte_vdev_device * dev)1007 rte_pmd_af_packet_probe(struct rte_vdev_device *dev)
1008 {
1009 int ret = 0;
1010 struct rte_kvargs *kvlist;
1011 int sockfd = -1;
1012 struct rte_eth_dev *eth_dev;
1013 const char *name = rte_vdev_device_name(dev);
1014
1015 PMD_LOG(INFO, "Initializing pmd_af_packet for %s", name);
1016
1017 if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
1018 eth_dev = rte_eth_dev_attach_secondary(name);
1019 if (!eth_dev) {
1020 PMD_LOG(ERR, "Failed to probe %s", name);
1021 return -1;
1022 }
1023 /* TODO: request info from primary to set up Rx and Tx */
1024 eth_dev->dev_ops = &ops;
1025 eth_dev->device = &dev->device;
1026 rte_eth_dev_probing_finish(eth_dev);
1027 return 0;
1028 }
1029
1030 kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), valid_arguments);
1031 if (kvlist == NULL) {
1032 ret = -1;
1033 goto exit;
1034 }
1035
1036 /*
1037 * If iface argument is passed we open the NICs and use them for
1038 * reading / writing
1039 */
1040 if (rte_kvargs_count(kvlist, ETH_AF_PACKET_IFACE_ARG) == 1) {
1041
1042 ret = rte_kvargs_process(kvlist, ETH_AF_PACKET_IFACE_ARG,
1043 &open_packet_iface, &sockfd);
1044 if (ret < 0)
1045 goto exit;
1046 }
1047
1048 if (dev->device.numa_node == SOCKET_ID_ANY)
1049 dev->device.numa_node = rte_socket_id();
1050
1051 ret = rte_eth_from_packet(dev, &sockfd, kvlist);
1052 close(sockfd); /* no longer needed */
1053
1054 exit:
1055 rte_kvargs_free(kvlist);
1056 return ret;
1057 }
1058
1059 static int
rte_pmd_af_packet_remove(struct rte_vdev_device * dev)1060 rte_pmd_af_packet_remove(struct rte_vdev_device *dev)
1061 {
1062 struct rte_eth_dev *eth_dev;
1063
1064 if (dev == NULL)
1065 return -1;
1066
1067 /* find the ethdev entry */
1068 eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
1069 if (eth_dev == NULL)
1070 return 0; /* port already released */
1071
1072 eth_dev_close(eth_dev);
1073 rte_eth_dev_release_port(eth_dev);
1074
1075 return 0;
1076 }
1077
1078 static struct rte_vdev_driver pmd_af_packet_drv = {
1079 .probe = rte_pmd_af_packet_probe,
1080 .remove = rte_pmd_af_packet_remove,
1081 };
1082
1083 RTE_PMD_REGISTER_VDEV(net_af_packet, pmd_af_packet_drv);
1084 RTE_PMD_REGISTER_ALIAS(net_af_packet, eth_af_packet);
1085 RTE_PMD_REGISTER_PARAM_STRING(net_af_packet,
1086 "iface=<string> "
1087 "qpairs=<int> "
1088 "blocksz=<int> "
1089 "framesz=<int> "
1090 "framecnt=<int> "
1091 "qdisc_bypass=<0|1>");
1092